His hands were weak and shaking from carrying far too many books from the bookshop. It was the best feeling.
As soon as you are trying to be funny or dramatic, that's when things start feeling fake and boring.
It's nice to not feel like you're just re-enacting a preconceived moment, but there's room for an organic feeling to develop while the camera is rolling. Even amidst these enormous technical productions, Chris [ Nolan] always prioritized making sure that sort of spontaneous and organic feeling could happen at the moment.